I'm getting an error when I try to bulk convert a lot of files at once. It doesn't matter which files, only that there are several. Sometimes it will happen with as few as 8 but other times I can convert as many as 20 with no issues. It also doesn't seem to matter what format I'm converting from or to. All the books where I receive the error can be converted in smaller batches with no problems. The error pops up when the files are queuing. I copied the error to clipboard and this is what I got:

I'm running this on a new Windows 8 (64 bit) computer. I know I wasn't having this problem with my old computer (64 bit Vista) so I tried uninstalling and re-installing an older calibre (0.9.20) but I got the same error, so I uninstalled that and re-installed 0.9.30. Sometimes it will queue the files but then give me this error in the middle of converting.

If your library is in a cloud directory such as Dropbox pause syncing before any bulk operations like conversions.

I think you might be on to something. I do have that folder set up to sync to the cloud so I'll try pausing it. I think you have also helped me solve a problem I've been having with a completely different piece of software, so thanks!

@matanic - while you're waiting for 8.1 you might want consider using Start Menu 8 - it adds the start button and an option to boot straight into windows desktop. http://www.iobit.com/iobitstartmenu8.php

I like it because that's all it does - i.e it doesn't claim to make Win8 look like Win '95

I think you might be on to something. I do have that folder set up to sync to the cloud so I'll try pausing it. I think you have also helped me solve a problem I've been having with a completely different piece of software, so thanks!

You're welcome.

I run calibre portable via Dropbox and whenever I go to upgrade I have to pause syncing. If I don't pause syncing there is a better than even money chance the install will fail. The same thing happens with bulk conversions every now and then one will hiccup if I don't pause syncing.

@matanic - while you're waiting for 8.1 you might want consider using Start Menu 8 - it adds the start button and an option to boot straight into windows desktop. http://www.iobit.com/iobitstartmenu8.php

I like it because that's all it does - i.e it doesn't claim to make Win8 look like Win '95

BR

I thought about it when I first got the new laptop but after some work, I have Win8 set up just the way I like it. You can bypass the Metro without using another program and I don't really seem to need the start button anymore. But thanks for the recommendation! I'm still keeping this program in the back of my mind in case I decide I can't live without the start button after all, and it's nice to hear from someone who uses it.